Latest project is available at the main page of the device. It is intended to work with the latest board revision. The latest project wouldn't probably work with previous board revisions and vice versa - previous versions of the examples (linked below) wouldn't work properly with newer boards.
In the wiki one can only find older projects, that still might be helpful. These projects are no longer officially supported. The best practice is to use the EXACT same compiler as mentioned and in most cases the exact same MPLAB version as mentioned.
Older projects released by Olimex for PIC32-MAXI-WEB:
1)IAR 6.30 demo example for board revision B, with different PHY/Ethernet - Micrel - download
2)IAR 5.50 demo example for board revision A, with yet another PHY/Ethernet - download
3)old Setup GCC+Eclipse for STM32 on MAC - click to visit resource